print('hello world')
print('i j + - * /')
# for i in range(1,10):
#     # print(i)
#
#     for j in range(1,10):
#
#         print(i,j,i+j,i-j,i*j,round(i/j,2))
#     #     print('%d*%d=%d '%(i,j,i*j),end='')
python